oj.uz

Submission #782403

# Submission time Handle Problem Language Result Execution time Memory
782403 2023-07-13T23:15:35 Z tvladm2009 Monochrome Points (JOI20_monochrome) C++17
100 / 100
 929 ms 7548 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
const int N = (int) 2e5 + 7;
int n;
int aib[2 * N];
vector<int> v[2];
string s;
 
void update(int x) {
  x++;
  for (int i = x; i < 2 * N; i += i & -i) {
    aib[i]++;
  }
}
 
int query(int x) {
  x++;
  int ret = 0;
  for (int i = x; i >= 1; i -= i & -i) {
    ret += aib[i];
  }
  return ret;
}
 
int get(int l, int r) {
  return query(r) - query(l);
}
 
ll solve(int offset) {
  for (int i = 1; i <= 2 * n; i++) {
    aib[i] = 0;
  }
  vector<pair<int, int>> seg;
  for (int i = 0; i < n; i++) {
    int j = (i + offset) % n;
    seg.push_back({v[0][i], v[1][j]});
    if (seg.back().first > seg.back().second) {
      swap(seg.back().first, seg.back().second);
    }
  }
  sort(seg.begin(), seg.end());
  ll ret = 0;
  for (auto &it : seg) {
    ret += get(it.first, it.second);
    update(it.second);
  }
  return ret;
}
 
int main() {
  ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
  ///freopen("input", "r", stdin);
 
  cin >> n >> s;
  for (int i = 0; i < 2 * n; i++) {
    v[(s[i] == 'B')].push_back(i);
  }
 
  int low = 0, high = n - 1, sol = 0;
  while (low < high) {
    int mid = (low + high) / 2;
    if (solve(mid) < solve(mid + 1)) {
      low = mid + 1;
    } else {
      high = mid;
    }
  }
  cout << solve(low) << "\n";
  return 0;
}

Compilation message

monochrome.cpp: In function 'int main()':
monochrome.cpp:63:30: warning: unused variable 'sol' [-Wunused-variable]
   63 |   int low = 0, high = n - 1, sol = 0;
      |                              ^~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 5 ms 340 KB Output is correct
35 Correct 4 ms 340 KB Output is correct
36 Correct 4 ms 340 KB Output is correct
37 Correct 4 ms 420 KB Output is correct
38 Correct 3 ms 340 KB Output is correct
39 Correct 6 ms 340 KB Output is correct
40 Correct 3 ms 340 KB Output is correct
41 Correct 3 ms 340 KB Output is correct
42 Correct 4 ms 340 KB Output is correct
43 Correct 4 ms 340 KB Output is correct
44 Correct 4 ms 420 KB Output is correct
45 Correct 4 ms 340 KB Output is correct
46 Correct 4 ms 412 KB Output is correct
47 Correct 3 ms 340 KB Output is correct
48 Correct 5 ms 340 KB Output is correct
49 Correct 3 ms 340 KB Output is correct
50 Correct 4 ms 340 KB Output is correct
51 Correct 3 ms 340 KB Output is correct
52 Correct 4 ms 424 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 5 ms 340 KB Output is correct
35 Correct 4 ms 340 KB Output is correct
36 Correct 4 ms 340 KB Output is correct
37 Correct 4 ms 420 KB Output is correct
38 Correct 3 ms 340 KB Output is correct
39 Correct 6 ms 340 KB Output is correct
40 Correct 3 ms 340 KB Output is correct
41 Correct 3 ms 340 KB Output is correct
42 Correct 4 ms 340 KB Output is correct
43 Correct 4 ms 340 KB Output is correct
44 Correct 4 ms 420 KB Output is correct
45 Correct 4 ms 340 KB Output is correct
46 Correct 4 ms 412 KB Output is correct
47 Correct 3 ms 340 KB Output is correct
48 Correct 5 ms 340 KB Output is correct
49 Correct 3 ms 340 KB Output is correct
50 Correct 4 ms 340 KB Output is correct
51 Correct 3 ms 340 KB Output is correct
52 Correct 4 ms 424 KB Output is correct
53 Correct 819 ms 7488 KB Output is correct
54 Correct 815 ms 7548 KB Output is correct
55 Correct 836 ms 7288 KB Output is correct
56 Correct 776 ms 7292 KB Output is correct
57 Correct 694 ms 7364 KB Output is correct
58 Correct 638 ms 7512 KB Output is correct
59 Correct 680 ms 7336 KB Output is correct
60 Correct 763 ms 7332 KB Output is correct
61 Correct 846 ms 7360 KB Output is correct
62 Correct 753 ms 7460 KB Output is correct
63 Correct 863 ms 7424 KB Output is correct
64 Correct 634 ms 7304 KB Output is correct
65 Correct 770 ms 7184 KB Output is correct
66 Correct 772 ms 7300 KB Output is correct
67 Correct 827 ms 7276 KB Output is correct
68 Correct 562 ms 7096 KB Output is correct
69 Correct 653 ms 7484 KB Output is correct
70 Correct 628 ms 7040 KB Output is correct
71 Correct 860 ms 7492 KB Output is correct
72 Correct 518 ms 7548 KB Output is correct
73 Correct 929 ms 7480 KB Output is correct